Are all of the Craft plugins and functionality available in Studio?

For our initial release of Studio, Freehand, Sync, and Prototype are targeted to have 100% parity with their equivalent Craft plugins(note that these are being natively implemented so some differences in how/where these are implemented will occur).

Feature equivalents for the Library, Data, and Duplicate plugins will be coming soon but may not be in play for our initial release. Craft Stock will not have parity in the immediate, though we would love to see this functionality come to Studio eventually via our Studio Apps ecosystem targeted for debut in the latter part of 2018.